What good did Snape do anyone by infiltrating the Death Eaters?

Question

OK, first of all, my Harry Potter knowledge is a bit rusty so I may be forgetting something.

In The Half-Blood Prince Dumbledore made Snape kill him (I know he was going to die anyway) so he could gain Voldemort's trust.
In The Deathly Hallows, his portrait instructs Snape to provide Voldemort with the correct date on which Harry was to be moved, again, to gain Voldemort's trust.

Why did Dumbledore want a spy in Voldemort's inner circle so badly?

Would anything have been different if Snape had not been in Voldemort's inner circle?

This question is already answered here. Not sure how I feel about closing your question as a dupe of a -6 score question though. Perhaps the best solution would be to merge the old question into yours, thus migrating my answer here? — Rand al'Thor, Mar 17 '16 at 12:01
I think Dumbledore wanted Snape to kill him less to gain Voldemort's trust and more to protect Draco's innocence (or what was left of it, anyway). It's been a while since I've read the book, but I seem to remember Dumbledore was more interested in preventing Draco from delivering the deathblow than anything else, really. — Ellesedil, Mar 17 '16 at 17:23
@Ellesedil Hmm. It's not entirely clear. Dumbledore says: "Ultimately, of course, there is only one thing to be done if we are to save [Draco] from Lord Voldemort's wrath. [...] You must kill me. [...] I ask this one, great favour of you, Severus, because death is coming for me as surely as the Chudley Cannons will finish bottom of this year's league. I confess I should prefer a quick, painless exit to the protracted and messy affair it will be if, for instance, Greyback is involved - I hear Voldemort has recruited him? Or dear Bellatrix, who likes to play with her food before she eats it." — Rand al'Thor, Mar 18 '16 at 00:26
@Ellesedil One would assume that if Voldemort didn't already trust Snape by Book 6, Snape would be dead — DavidS, Mar 18 '16 at 09:59
@randal'thor: Isn't there a passage where Dumbledore speaks about saving Draco's soul, with Snape immediately asking Dumbledore if he's concerned about his (Snape's) soul? I really wish I had access to these books to double-check. — Ellesedil, Mar 18 '16 at 16:53
@Ellesedil Yes, that's in the middle of the passage I'm quoting. S: "If you don't mind dying, why not let Draco do it?" D: "That boy's soul is not yet so damaged. I would not have it ripped apart on my account." S: "And my soul, Dumbledore? Mine?" D: "You alone know whether it will harm your soul to help an old man avoid pain and humiliation." — Rand al'Thor, Mar 19 '16 at 00:48
I believe that all of you are forgetting one important point - the master wand (or whatever the name was, I read the book when it was released so a bit shady in details)! Whoever would kill Dumbledore would be the owner of the wand. Obviously Potter wouldn't kill Dumbledore, and there is a chance that the death eaters would not let Voldemort kill Draco, once he had killed Dumbledore. So the best way to transition the ownership to Potter is Dumbledore -> Snape -> Voldemort -> Potter. — Cool_Coder, Mar 20 '16 at 00:35
@Cool_Coder, the "chance that death eaters would not let Voldemort kill Draco..." seems both impossible and irrelevant...wouldn't it be a bad thing if Voldemort killed Draco and thus gained power over the wand? — Wildcard, Mar 20 '16 at 10:44
Well of course Voldemort wanted power over the wand, that is why he killed Snape. — Cool_Coder, Mar 20 '16 at 16:18
Dumbledore wanted Snape to kill him less to gain Voldemort's trust and more to stop Elder Wand's further possession. Snape's death blow wouldn't have been a defeat for Dumbledore because Dumbledore asked for it. Unfortunately, this didn't go according to the plan and Draco managed to disarm Dumbledore before Snape could kill him. — user931, May 29 '18 at 05:22

Rand al'Thor · Accepted Answer · 2016-03-18T00:34:52.500

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He was invaluable as a spy.

As a double (triple, quadruple) agent, Snape served two purposes:

As an Order agent in Voldemort's ranks, he could pass information about Voldemort's plans to Dumbledore and the Order.
Since Voldemort believed him to be a spy for him in the Order's ranks, he could pass false information about the Order's plans to Voldemort.

Both of these are extremely important roles in espionage. The secret of all warfare is knowing the enemy's plans while keeping your own hidden, so as to keep the element of surprise. The two-way flow of information through Snape gave the Order a much-needed advantages over Voldemort.

"All war is based on deception" -- Sun Tzu, The Art of War.

After Dumbledore's death, he was the most direct link between the late Headmaster and Harry. He was the person who, on instructions from Dumbledore's portrait, conjured the Patronus to lead Harry to the sword of Gryffindor.

He also used his position as a double agent during this time to subtly protect the students at Hogwarts while seeming to be terrorising them on Voldemort's instructions. Using his power as Headmaster, he kept the Carrow siblings under control and ensured many students were given 'fake' punishments such as being sent into the Forest with Hagrid.

Not really relevant to the main point of your question, but as @Ellesdil pointed out in a comment, Dumbledore's reasons for having Snape kill him were considerably more than just for the latter to gain Voldemort's trust:

"Ultimately, of course, there is only one thing to be done if we are to save [Draco] from Lord Voldemort's wrath. [...] You must kill me. [...] I ask this one, great favour of you, Severus, because death is coming for me as surely as the Chudley Cannons will finish bottom of this year's league. I confess I should prefer a quick, painless exit to the protracted and messy affair it will be if, for instance, Greyback is involved - I hear Voldemort has recruited him? Or dear Bellatrix, who likes to play with her food before she eats it."

_{-- Dumbledore, HP and the Deathly Hallows, Chapter 37: The Prince's Tale}

edited Mar 18 '16 at 00:34

answered Oct 04 '15 at 11:55

Rand al'Thor

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+1 for the quote! In the era of social media it's more true than anyone could imagine. – KeyWeeUsr Mar 17 '16 at 20:07
rand - you might look at @Ellesedil 's comment to the question to make your answer more complete. -- The OP does make an assumption that isn't true and Ellesedil rightly calls that out. – user23715 Mar 17 '16 at 20:22
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It's a little strange that this answer was posted before the question. But that's probably irrelevant. – wizzwizz4 Mar 17 '16 at 20:25
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@wizzwizz4: Not sure if you already realize this, but: that's because the answer was originally posted at http://scifi.stackexchange.com/questions/104372. That question was merged into this one a few hours ago. – ruakh Mar 17 '16 at 20:31
Small note: It was my understanding that Snape cast the patronus to lead Harry to the sword while Dumbledore was still alive, at least in the film. – Sam Weaver Mar 17 '16 at 20:37
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@SamWeaver -- Dumbledore died at the end of Half Blood Prince. The Patronus 'lure' was mid-Deathly Hallows. – user23715 Mar 17 '16 at 21:30
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@ruakh It was supposed to be a witty comment... – wizzwizz4 Mar 17 '16 at 21:37
@user23715 Thanks, done. – Rand al'Thor Mar 18 '16 at 00:35
@wizzwizz4 I've got a Time-Turner. – Rand al'Thor Mar 20 '16 at 17:06
@randal'thor I thought there was only one left. Oh, wait... – wizzwizz4 Mar 20 '16 at 17:20
Are we aware of instances when Snape gave false information to Voldemort? – Xantec Jun 28 '16 at 21:43
@Xantec Good question. IIRC he gave some false information relating to Harry's final departure from Privet Drive? – Rand al'Thor Jun 28 '16 at 22:35
Include the point of Elder Wand possession plan of Dumbledore. See my comment on the question. – user931 May 29 '18 at 05:23

score 18 · Answer 2 · edited Mar 17 '16 at 14:00

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Yes, Snape would have provided any information he learned about Voldemort's and the Death Eaters' plans.

Such as:

Hocruxes (what objects they might be or where)
Elder Wand / Hallows (if Voldemort had made any connections)
New Recruits (such as Draco)
Movements or locations of Death Eaters
What other factions Voldemort has recruited (Dementors, Giants, etc.)

The list could go on. We may never see this information relayed directly as Harry's POV is our view into the world and Harry would not have first-hand accounts of this; only what Dumbledore or Snape told him or what he saw in the Pensieve.

Also, I would argue that Dumbledore had Snape fulfill the "murder" so the ownership of the Elder Wand would pass to Snape and to save both Draco and Serverus' lives, as an Unbreakable Vow had been made between them.

edited Mar 17 '16 at 14:00

T.E.D.

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answered Mar 17 '16 at 11:53

Skooba

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While I agree with the last 3 points, I do not think he could have provided any information on the first two.
First, it is well known that Voldemort kept his Horcruxes (and his past in general) a very closely guarded secret. R.A.B. only learned of them because Voldemort discounted a house elf. Dumbledore never even confided with Snape about the Horcruxes.

In regards to the Elder Wand, the 7th book makes it fairly clear that Voldemort saw it as a quest he must undertake alone. None of the other Death Eaters were aware of where he went during his search for that Hallow.
– ssell Mar 17 '16 at 16:02
@ssell Very true, I was more implying that Snape could pick up on clues in Voldemort's behavior or read into certain things he did say. I listed in more of order of magnitude if the information was found rather than he likely hood of that information being discovered. Granted he had already turned a Hallow into a Horcrux... So yes very valid point! – Skooba Mar 17 '16 at 16:21
Actually if the plan went as planned the wand would have died. If Severus was the master he would have been murdered immediately. He was in the false belief that he was wasn’t he? That’s obvious or it should be. And it certainly was to the two. So your last suggestion is wrong no matter what. – Pryftan May 13 '18 at 21:40

score 9 · Answer 3 · answered Mar 18 '16 at 07:55

During Voldemort's first rise, Snape's information very nearly saved James and Lilly Potter. After passing on the fragment of Trelawny's prophecy that he'd overheard at the Hog's Head, Snape found that Voldemort thought the prophecy referred to the then-infant Harry, and was going to go and murder him to make sure the threat would never arise. This of course is what sent Snape to Dumbledore to change sides, and that information also led to Dumbledore's suggestion that the Potters use the Fidelius charm to protect themselves.

This worked perfectly until their Secret-Keeper betrayed them, but had that not happened - had they chosen Sirius or Dumbledore instead of Pettigrew - they would have remained perfectly safe.

Of course, that was just the information with which Snape proved his betrayal of Voldemort. We don't know how much other useful information was passed before Voldemort's attack on the Potters because it was never directly relevant to Harry's plotline and our limited POV prevents us from finding out about it.

During the second rise of Voldemort, Snape was there almost from the beginning, acting as a double agent. Dumbledore would have known who'd returned to the fold, would have known many who had been placed under the Imperius curse, and other valuable information. It is entirely possible that without Snape, Voldemort would have taken over the Ministry a year earlier. It's even more possible that without Snape calling in the Order of the Phoenix at the end of the fifth book, the Death Eaters would have captured Harry and Voldemort would have killed him shortly afterwards.

"Snape's information very nearly saved James and Lilly Potter" - and on the flipside, Snape's information provided to Voldemort before that was exactly what killed them. Still, +1 for a nice summary and some specific examples. — Rand al'Thor, Mar 18 '16 at 07:58
Yeah it was that which led him to change sides of course. He passed on the prophecy but never imagined it'd lead to a threat to Lily - and he probably had no idea how strongly he'd react to hearing about that either. — Matthew Walton, Mar 18 '16 at 08:17

score 4 · Answer 4 · edited Jun 28 '16 at 22:18

With regard to the Elder Wand, the importance of Severus killing Dumbledore is that the Dark Lord would assume that this had made him master of the wand, when in fact Draco became master of the wand when he disarmed Dumbledore.

When Harry then disarmed Draco, this made him master of the wand at a time that the Dark Lord believed that Severus was the master. The Dark Lord then killed Severus, intending to become the wand's master, and Severus went willingly to his death, knowing that he had delivered the final deception that would permit Harry to overcome him.

When Tom then dueled Harry at the end, having killed the portion of his soul that was inside Harry, he was trying to use the wand against its master, and thus fatally weakened.

"Willingly" might be stretching it - he didn't have much of a chance — NKCampbell, Jun 28 '16 at 22:13

score 0 · Answer 5 · edited Jun 16 '20 at 09:31

Snape was able to protect Hogwarts when the Dark Lord had it.

One of Dumbledore’s reasons for wanting Snape to remain in the Dark Lord’s trust was so Snape would be able to protect Hogwarts. Though Hogwarts was safe while Dumbledore lived, he knew since he touched Marvolo Gaunt’s ring that he was dying, and his presence would no longer keep Hogwarts safe. Therefore, it became more important to have someone who’d try to protect the students, and since the Dark Lord trusted Snape, he’d have a better chance of controlling things.

“He believes the school will soon be in his grasp, yes.’

‘And if it does fall into his grasp,’ said Dumbledore, almost, it seemed, as an aside, ‘I have your word that you will do all in your power to protect the students of Hogwarts?’

Snape gave a stiff nod.”
_{^{- Harry Potter and the Deathly Hallows, Chapter 33 (The Prince’s Tale)}}

Dumbledore emphasizes to Snape that it’s important he remains trusted by the Dark Lord, because otherwise Hogwarts will be in the complete control of the Carrows.

“And Severus, if you are forced to take part in the chase, be sure to act your part convincingly … I am counting upon you to remain in Lord Voldemort’s good books as long as possible, or Hogwarts will be left to the mercy of the Carrows …”
_{^{- Harry Potter and the Deathly Hallows, Chapter 33 (The Prince’s Tale)}}

By remaining trusted, Snape was able to take over as headmaster and help protect Hogwarts.

What good did Snape do anyone by infiltrating the Death Eaters?

5 Answers5

He was invaluable as a spy.

Snape was able to protect Hogwarts when the Dark Lord had it.

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